nixos-configs/devices/cluster/hardware-configuration.nix

{
  config,
  modulesPath,
  ...
}: {
  nixpkgs.hostPlatform = "x86_64-linux";
  imports = [(modulesPath + "/installer/scan/not-detected.nix")];

  boot = {
    loader = {
      efi.canTouchEfiVariables = true;
      timeout = 2;

      systemd-boot = {
        enable = true;
        consoleMode = "max";
        configurationLimit = 30;
      };
    };

    initrd.availableKernelModules = [
      "xhci_pci"
      "ahci"
      "usbhid"
      "usb_storage"
      "sd_mod"
    ];
  };

  fileSystems = {
    "/" = {
      device = "/dev/disk/by-label/NIXROOT";
      fsType = "btrfs";
    };

    # sudo btrfs subvolume create /@swap
    "/swap" = {
      device = "/dev/disk/by-label/NIXROOT";
      fsType = "btrfs";
      options = ["subvol=@swap"];
    };

    "/boot" = {
      device = "/dev/disk/by-label/NIXBOOT";
      fsType = "vfat";
    };
  };

  swapDevices = [
    {
      device = "/swap/swapfile";
      size = 16 * 1024;
    }
  ];

  zramSwap.enable = true;

  hardware.cpu.intel.updateMicrocode = config.hardware.enableRedistributableFirmware;
}